(N.)
1. Something that makes you have to do something.
2. A faggot ass pussy on Muredr Inc.

It's the M-U-R-E-D-R Inc., niggah! I'm the rapper who fags, and totes tampax in bags, and the feds can't just f**k me, straight up the ass, make the Rule scream Holla! in the prison beds because..., I'M HURTING!

The Urban Dictionary T-Shirt

I walked into my Catholic School class, breaking as many "rules" as I could. I had a hat on (twisted halfway to the left), chomping on gum and blowing big pink bubbles, shirt untucked, no belt underneath, shoe laces undone, and to top it off I walked in five minutes after the bell. My teacher nearly had a heart attack when she saw me slouching in my seat and in this state of so-called "disrepair." She shrieked at me. "You know the rules! No gum, shirt tucked in, a belt, and your shoes MUST.BE.TIED! Get to class on time next time, or instead of a tardy I'll send you to the principal. Now get out your homework!" I nonchalantly asked, "What homework?" She screamed, "You know the rules, do your homework." And I responded deadpan, "Rules are things that are made to be broken."

The Urban Dictionary T-Shirt

A statement which denies people what they might want to do. Normally written after the event has happened. Does not stop people ignoring it, called breaking the rule, as most people are unaware of it, or think the rule is wrong. Breaking the rule usually incurs some penalty if caught doing so.